<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script src="./js/vue.js"></script>
    <div class="box">
        <h1>{{msg}}</h1>
    </div>
    <script>
        const vm=new Vue({
            // el:'.box',
            data:{
                msg:'服务器  客户端'
            }
        })
        // $mount挂载  相当于el:'.box'
        vm.$mount('.box');
    </script>
</body>
</html>